*{
    padding: 0;
    margin: 0;
    font-family: "楷体", serif;
}
header{
    background-image:linear-gradient(rgba(0,0,0,0.5),rgba(0,0,0,0.5)),url("../img/index.jpg");
    height: 100vh;
    background-size: cover;
    background-position: center;
}

ul{
    float: right;
    list-style-type: none;
    margin: 15px;
}
ul li{
    display: inline-block;
}

ul li a{
    text-decoration: none;
    color: #fff;
    padding: 5px 20px;
    border: 1px solid transparent;
    transition: .6s ease;
    border-radius: 20px;
}

ul li a:hover{
    background-color: #fff;
    color: #000;
}
ul li.active a{
    background-color: #fff;
    color: #000;
}
.title{
    position: absolute;
    top:50%;
    left:50%;
    transform: translate(-50%,-50%);
}
.title h1{
    color: #fff;
    font-size: 70px;
    font-family: Century Gothic, serif;
}